BCM Carbine and Mk18 Extractor Spring Upgrade Kit for short barreled weapons

ships from our shop in 3 to 5 days (+/-)

Bravo Company BCM Carbine Extractor Spring Upgrade Kit 

An upgrade kit for Mk18 and other short barreled rifles and pistols

When the Mk18 was created back in 2001, the extreme pressures and very short duration caused by the short barrel and short dwell time resulted in very quick wear of the bolt carrier groups made for M4 14.5" carbines.  A lot of effort was put into making changes by NSWC Crane and by the US Army to repair and to remediate the result of the violent slamming of the BCG back and forth in few short cycles.  Over time, the US Military found solutions and today the 10.3" and 11.5" Mk18 CQBR work like a charm. One of the solutions was to improve the extractor spring mechanism in the Mk18 rifle in the early 2000s.

Today, a properly running Mk18 CQBR with 77 grain ammo and an H2 or H3 buffer should perform just fine.  But, if you are having troubles, or you just want to be extra sure, as the US Military did back in the early days of the Global War on Terror, an upgrade to the extractor spring set can be a welcome reinforcement.

Bravo Company took the lead early on in providing upgrades to the extractor of short barreled weapons with this three-part kit.

The BCM Extractor Spring is a heavy coil design made for the increased extractor tension required on many AR15, M4, M16 short barreled rifles and AR pistol setups. This product can also improve the reliability on standard 16" and 14.5" carbines.
The BCM Extractor Spring is manufactured in an ISO 9001 facility with the latest precision equipment. The BCM extractor kit includes the highest quality chrome silicon material, heat treats to stress relieve the product and shot peens to add increased strength.
This kit also includes the new black extractor insert, standard on all M4, M4A1, Mk18 carbines and the recent new standard on M16A4 rifles. The BCM Extractor Spring is so strong the Mil-Spec Crane O-Ring will probably not be needed, but it is included.

This kit includes:

- BCM Extractor Spring (chrome silicon, heat treated & stress relieved, shot peened)
- Crane Ind O-Ring (Mil-Spec)
- Black Extractor Insert
Manufacturer's Part Number  BCM-EXSPRING-1