Bravo Company USA, Inc.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Approximate Weight: 5.3lbs
Collapsed Length: 25.5"
Extended Lenght: 28.5"
 
UPPER RECEIVER

Receiver Machined from Aluminum Forgings 7075-T6 and Hardcoat Anodized per MIL-A-8625F, Type III, Class 2
M4 Feed Ramp Flat Top with Laser T-markings
Pistol Length Gas System
BCM® KMR Alpha-8 Handguard
BCM® BOLT CARRIER GROUPMachined from Milspec Carpenter No. 158® Steel
HPT/MPI (High Pressure Tested/Proof) · (Magnetic Particle Inspected)
Shot Peened
Tool Steel Extractor w/ BCM® Extractor Spring
Chrome Lined Carrier (Full Auto Profile)
Hardened, Chrome Lined Gas Key w/Staked Grade 8 Fasteners per Milspec

BCM® LOWER RECEIVER

Receiver Machined from Aluminum Forgings 7075-T6, Hardcoat Anodized (per MIL-A-8625F, Type III, Class 2)
Low Shelf for RDIAS Installation - Installation of a registered drop-in auto sear allows weapon to fire on full automatic
Fire Controls Marked SAFE and SEMI
BCM® Milspec 7075-T6 Receiver Extension
Staked M4 Lock Nut
USGI H Buffer (1 USGI Tungsten, 2 Steel)
BCM® BARRELIndependently Certified Milspec 11595E Barrel Steel, Manganese Phosphate Barrel Finish on Entire Barrel
9" BCM® Enhanced Profile Barrel 1/7 Twist, M4 Feed Ramp Extension
Chrome Lined Bore and Chamber

Caliber: 300 AAC BLACKOUT
Barrel Length: 9"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Taper w/ Fluting
Gas System: Pistol Length
Approximate Weight: 5.7 lbs.
Approximate Length: 28.5"
Brace: SBA3

Part Number: BCM-PISTOL-503-890
Caliber: 300 AAC BLACKOUT
Barrel Length: 9"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Taper w/ Fluting
Gas System: Pistol Length
Approximate Weight: 4.9 lbs.
Approximate Length: 25"

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A8 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 1 7.62 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Caliber: 5.56 x 45mm NATO
Barrel Length: 11.5"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Carbine Length
Approximate Weight: 5.6 lbs.
Approximate Length: 27"
Brace: SBA3

Caliber: 5.56 x 45mm NATO
Barrel Length: 11"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Light Weight
Gas System: Carbine Length
Approximate Weight: 5.5 lbs.
Approximate Length: 27"
Brace: SBA3

Part Number: BCM-PISTOL-610-890
Caliber: 5.56 x 45mm NATO
Barrel Length: 11.5"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Carbine Length
Approximate Weight: 5.1 lbs.
Approximate Length: 27"

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A10 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Part Number: BCM-PISTOL-610-890
Caliber: 5.56 x 45mm NATO
Barrel Length: 11"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Light Weight
Gas System: Carbine Length
Approximate Weight: 5.0 lbs.
Approximate Length: 27"

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A10 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Complete BCM® Rifles and Carbines include: Rifle, 1 Magazine (where allowed), Cable Lock, USGI Manual, and F.E.T.

Part Number: BCM-CARBINE-650-111
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Carbine Length
Approximate Weight: 6.3 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMGUNFIGHTERT Included Upgrades:

PKMR Polymer KeyMod Handguard
BCM Mod 4 Charging Handle
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Includes the following features:

• BCMGUNFIGHTERT Mod 4 Charging Handle
• Detachable Carry Handle
• Carbine Length Gas System
• M4 Feed Ramp Barrel Extension
• M4 Feed Ramp Flat Top Receiver
• T-Marked Upper Receivers
• USGI 5.56mm NATO Chambers
• Independently Certified Mil-Spec 11595E Barrel Steel
• Chrome Lined Bore and Chamber
• Manganese Phosphate Barrel Finish on entire barrel
• Mil-Spec F-Marked Forged Front Sights
• Taper Pinned Front Sight Base
• USGI Government Profile Barrels
• HPT (High Pressure Test, per Milspec) Barrels
• MPI (Magnetic Particle Inspected, per Milspec) Barrels
• Bolt machined from Mil-Spec Carpenter No. 158® steel
• HPT Bolt (High Pressure Tested/ Proof)
• MPI Bolt (Magnetic Particle Inspected)
• Shot Peened Bolt
• Chrome Lined Carrier (AUTO)
• Chrome Lined Gas Key
• Gas Key Hardened to USGI Specifications
• Grade 8 Hardened Fasteners Key
• Staked Per Mil-Spec
• Tool Steel Extractor
• BCM® Extractor Spring
• Black Extractor Insert
• Receivers Machined from Aluminum Forgings 7075-T6
• Receivers Hardcoat Anodize per MIL-A-8625F, Type III, Class 2
• BCM® Milspec 7075-T6 Receiver Extension
• USGI Mold M4 Stock Staked M4 Lock Nut
• USGI H Buffer (1 USGI Tungsten, 2 Steel)
• Magpul MOE Enhanced Trigger Guard
• Low Shelf for RDIAS installation
• Low Shelf for Accuwedge use
• Un-notched Hammer compatible with 9mm use
• Fire Controls marked SAFE and SEMI

Part Number: BCM-CARBINE-650-133
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Carbine Length
Approximate Weight: 6.5 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMT Included Upgrades:

Quad Rail Tactical Handguard
BCM Stock Mod 0
BCM Mod 4 Charging Handle
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard
Rear Folding Back Up Iron Sight

Caliber: 300 AAC BLACKOUT
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Taper w/Fluting
Gas System: Carbine Length
Approximate Weight: 6.1 lbs.
Approximate Length: 32.5" Collapsed -  35.5" Extended

Part Number: BCM-CARBINE-653-790
Caliber: 300 AAC BLACKOUT
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Taper w/Fluting
Gas System: Carbine Length
Approximate Weight: 6.1 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A13 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator 762/300
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Part Number: BCM-CARBINE-750-121
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.5 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMT Included Upgrades:

PKMR Polymer KeyMod Handguard
BCM Stock Mod 0
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Part Number: BCM-CARBINE-750-133
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.7 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMT Included Upgrades:

Quad Rail Tactical Handguard
BCM Stock Mod 0
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard
Rear Folding Back Up Iron Sight

Part Number: BCM-CARBINE-750-140
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.5 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMT Included Upgrades:

Quad Rail Free Float 12" Handguard
BCM Stock Mod 0
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.1 lbs.
Approximate Length: 32.5" Collapsed - 35.5" Extended

Upper Receiver, Lower Receiver, and MCMR are Finished in Cerakote Dark Bronze

Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Light Weight
Gas System: Mid Length
Approximate Weight: 5.8 lbs.
Approximate Length: 32.5" Collapsed - 35.5" Extended

Part Number: BCM-CARBINE-750-790
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.1 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A15 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Part Number: BCM-CARBINE-750-790-BRZ
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.1 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

Upper Receiver, Lower Receiver, and KMR-A are Finished in Cerakote Dark Bronze

BCMGUNFIGHTERT Included Upgrades:
BCM KMR-A13 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Light Weight
Gas System: Mid Length
Approximate Weight: 5.8 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMGUNFIGHTERT Included Upgrades:
BCM KMR-*ALPHA* 13 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-8"
Barrel Material: 410 Stainless Steel
Bore and Chamber: Stainless Steel
Barrel Profile: Medium Contour
Gas System: Mid Length
Approximate Weight: 6.5 lbs.
Approximate Length: 32.5" Collapsed - 35.5" Extended

Part Number: BCM-CARBINE-752-790
Caliber: 5.56 x 45mm NATO
Barrel Length: 16"
Twist Rate: 1-8"
Barrel Material: 410 Stainless Steel
Bore and Chamber: Stainless Steel
Barrel Profile: Medium Contour
Gas System: Mid Length
Approximate Weight: 6.5 lbs.
Approximate Length: 32.5" Collapsed; 35.5" Extended

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A15 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 0 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Part Number: BCM-CARBINE-780-140
Caliber: 5.56 x 45mm NATO
Barrel Length: 14.5" Plus Permanent Comp, 16.1"+
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.3 lbs.
Approximate Length: 31.5" Collapsed; 34.5" Extended

BCM Included Upgrades:

Quad Rail Free Float 12" Handguard
BCM Stock Mod 0
BCM Mod 4 Charging Handle
BCM Mod 1 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Caliber: 5.56 x 45mm NATO
Barrel Length: 14.5" Plus Permanent Comp, 16.1"+
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.0 lbs.
Approximate Length: 31.5" Collapsed - 34.5" Extended

Caliber: 5.56 x 45mm NATO
Barrel Length: 14.5" Plus Permanent Comp, 16"+
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Light Weight
Gas System: Mid Length
Approximate Weight: 5.7 lbs.
Approximate Length: 31.5" Collapsed - 34.5" Extended

Part Number: BCM-CARBINE-780-790
Caliber: 5.56 x 45mm NATO
Barrel Length: 14.5" Plus Permanent Comp, 16.1"+
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: USGI Profile
Gas System: Mid Length
Approximate Weight: 6.0 lbs.
Approximate Length: 31.5" Collapsed; 34.5" Extended

BCMGUNFIGHTERT Included Upgrades:

BCM KMR-A13 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 1 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Caliber: 5.56 x 45mm NATO
Barrel Length: 14.5" Plus Permanent Comp, 16"+
Twist Rate: 1-7"
Barrel Material: 11595E Certified Steel
Bore and Chamber: Chrome Lined
Barrel Profile: Enhanced Light Weight
Gas System: Mid Length
Approximate Weight: 5.7 lbs.
Approximate Length: 31.5" Collapsed; 34.5" Extended

BCMGUNFIGHTERT Included Upgrades:

BCM KMR *ALPHA* 10 Free Float Handguard
BCM KeyMod QD Sling Swivel Mount
BCM Mod 4 Charging Handle
BCM Mod 1 Compensator
BCM Mod 3 Pistol Grip
BCM QD End Plate
BCM PNTT Trigger
BCM Trigger Guard

Caliber: 5.56 x 45mm NATO
Barrel Length: 18"
Twist Rate: 1-8"
Barrel Material: 410 Stainless Steel
Bore and Chamber: Stainless Steel
Barrel Profile: Mk12 Contour
Gas System: Rifle Length
Approximate Weight: 7 lbs.
Approximate Length: 34" Collapsed - 37" Extended

BCM® RECCE-18 KMR-A Precision Rifle

• Fully ambidextrous: made to mount flush or cantilever off either the left or right side of the rail system.
• Optional high and low mounting position for the 1913 rail section.
• Fits most common 1913-rail pistol/weapon light systems
• Multiple mounting holes for ideal placement.
• Designed to mount on the 3 or 9 o'clock rail positions.
• Durable Aluminum construction. Intently designed to be low-profile and snag-free
• Patent Pending mounting system
• Minimal added weight, 0.9 oz.
• BCM US Patent Number 9,377,274

• Fully ambidextrous: made to mount flush or cantilever off either the left or right side of the rail system.
• Optional high and low mounting position for the 1913 rail section.
• Fits most common 1913-rail pistol/weapon light systems
• Multiple mounting holes for ideal placement.
• Designed to mount on the 3 or 9 o'clock rail positions.
• Durable Aluminum construction. Intently designed to be low-profile and snag-free
• Patent Pending mounting system
• Minimal added weight, 0.9 oz.

The A2XT is an extended version of the A2 flash hider found on the M16 and M4 series of rifles.

• Threaded 1/2"x 28 for your 5.56mm carbine.
• Machined from 4150 steel.
• Phosphate coated per MIL-STD-171.
• Predrilled hole at the base for permanent installation.

When mounted per BATF specifications for a permanent installation it will bring your 14.5" M4 barrel to a non-NFA length of over 16.1".

Installation should be done by a qualified gunsmith familiar with BATF regulations.

The A2XT is predrilled and comes with a dowel pin and crush washer for installation.
Made by Bravo Company MFG, Inc. (BCM®).

This kit includes all the Mil-Spec quality components you have come to expect from BCM, along with some fantastic upgrades to include:

• BCM PNTT Trigger Assembly
• BCM Pistol Grip, Mod 3
• BCM Enhanced Trigger Guard

In a commercial market flooded with imported and low quality Mil-Spec imitations, you can trust that BCM parts are made in the USA and to the highest standards. Please look at the information below.

BCM PNTT Trigger Assembly (Polished - Nickel - Teflon).

BCM quality, modern manufacturing processes, and aerospace coatings are combined to ensure parts last a lifetime while performing far beyond requirements established nearly six decades ago.

The BCM PNTT Trigger and PNTT Hammer are a precision machined Mil-Spec AISI8620 investment casting per the USGI TDP (Mil-Spec) for M16/M4 family of weapons. (not to be confused with MIM parts that are very common in the commercial market). 156/157 holes are honed to assist in perfect alignment and a smooth trigger pull.

After that, the BCM PNTT Trigger and PNTT Hammer then goes through a 3 step heat treat and case hardening process for optimal grain structure alignment, yielding a stronger and more wear resistance product..

Polished

The sear engagement surfaces are ground, but then hand polished for an increased smoothness up to 300% beyond the Mil-Spec.

Nickel

An electroless nickel finish is applied for a smoother trigger pull with less 'grit' and reduced felt 'creep'. Nickel also provides a long lasting finish that will not corrode, rust, or discolor due to oxidation.

Teflon

Teflon particles are embedded in the nickel, further reducing the friction of the interface and ensuring a long lasting coating. This is done on both the BCM PNTT Trigger and Hammer in order to provide the maximum benefit allowed by the nickel coating, by augmenting the low friction and corrosion resistance.

This assembly includes our impact resistant trigger and hammer pins. They are centerless ground to a fine finish and superior tolerances to ensure compatibility with all MIL SPEC lower receivers built per the USGI TDP.

The BCM Disconnector is stamped from a 1070 material and fine blanked for cleaner edges, double disc ground to precise size. All hammer engagement surfaces are also ground for a super clean reset.
The processes and tolerances are matched in the BCM PNTT Trigger Assembly to create a system better than the sum of its parts.

Bolt Catch and Safety Selector

The BCM Bolt Catch and Safety Selector are a Mil-Spec AISI8620 investment casting per the USGI TDP for M16/M4 family of weapons. (not to be confused with MIM parts that are very common in the commercial market)
The Safety Selector is center-less ground. The Selector and Bolt Catch are machined to the Mil-Spec , then goes through a 3 step heat treat and case hardening process for optimal grain structure and wear resistance. Has a phosphate finish for corrosion resistance.

BCM Magazine Catch

The BCM Magazine Catch Assembly (plate and the post) is precision machined Mil-Spec AISI8620 per the USGI TDP for M16/M4 family of weapons. (not to be confused with MIM parts that are very common in the commercial market) and a hardened alloy steel shaft.

The BCM Magazine Catch is machined to the Mil-Spec , then goes through a 3 step heat treat and case hardening process for optimal grain structure and wear resistance. The shaft is hardened, centerless ground, and precision threaded. Parts are assembled and staked per the USGI TDP and given a phosphate finish for corrosion resistance.

BCM Rear Takedown Pin and Front Pivot Pin

BCM Rear Takedown Pins and Front Pivot Pins are made from AISI8620 bar stock and machined per the USGI TDP for M16/M4 family of weapons. Our takedown pins are given a 3 step heat treat processes and the diameters are ground to final size prior to a corrosion resistant phosphate finish.

BCM Detents and Springs

Takedown detents include a cadmium chromate coating to resist corrosion and prevent them seizing in the small holes of the lower receiver while the Buffer retainer and Bolt Stop Plunger are made from hardened alloy steel for wear resistance and finished with a phosphate coating to prevent corrosion. The Springs are 17-7PH Stainless Steel to prevent corrosion and retain adequate tension for a lifetime of service.