BMS Cam rifle

The BMS Cam rifle is a series of British bolt action rifles made by BMS Trading Ltd chambered in the 5.56×45mm NATO cartridge and using STANAG magazines. The rifle was introduced in 1980 and is still in production as of 2018. The rifle has been popular for hunting and sport shooting in the UK, and has also seen some limited use as a sharpshooter rifle by some British police and military units as well as some American police units.
Technical.
The name of the rifle comes from the unique camming mechanism design of the bolt which is used in order to provide a mechanical advantage to ensure chambering and primary extraction with the AR-type barrel and bolt head used on the rifle. With its eight bolt lugs the rifle has a bolt lift of only 22.5°, which is very short compared to the 60 to 90° bolt lifts found on most other rifles. Patents for the camming action were applied for in 1988, but were refused in 1992 as details had been made public by the makers before the application was submitted. The mechanism cocks on closing similar to the Lee–Enfield, and the trigger unit is very similar to the Mauser K98. Due to its firing pin design being similar to the Mauser, the Cam rifle has a lock time comparable to the Mauser. The rifle has a relatively small and constricted ejection port which enhances receiver stiffness. Trigger pull weight can be adjusted using a hex key, and the safety operates similarly to the Garand rifle. The trigger guard is oversized to facilitate operation with gloves in cold weather.
Variants.
Numerous versions and upgrades have been made over the years. The latest versions all have a carbon fiber composite stock. Options for mounting optical sights have also varied thoroughout the years, from iron sights only on the first models, to various dovetail rails on later models. All current models have an integrated Weaver rail (not Picatinny compatible).