We are expecting, today, the Osprey Defense, OPS-416 gas piston conversion kits.
-converts standard gas impingement system to a gas-piston system
-works with any AR15/M16/M4
-requires 11-5"-20 " barrel configuration
-improved reliability by 1300% (claimed)
-shoot your bolt dry
-dramatically reduces cleaning
-includes instructions, new handguard, piston and patented carrier with monolithic gas hey. $399. Phil.