Aim Sports M4 Stock Lock Pin 1.4" Steel Black

The Aim Sports M4 Stock Lock Pin is a compact locking pin designed to secure an M4 / AR-platform collapsible buttstock in the extended position. Purpose-built for California featureless rifle configurations, the pin installs at the carbine buffer tube / lower receiver interface to lock the stock in place without any permanent modification, letting the shooter keep a collapsible AR stock in service while presenting a fixed length-of-pull for legal compliance.

Machined from steel with a black finish, the lock pin measures 1.40" L and drops in in seconds. It is fully reversible and non-destructive, making it a simple, effective solution for AR-15 owners running California featureless builds, or anyone who needs to lock a collapsing carbine stock in position without pinning or welding.