“I had nickel boron Fail Zero BCG and I had issues with the gas key not seated properly on the carrier so I purchased another BCG from Arm or Ally and this one works with no issues.”
“Always use Toolcraft BCG’ s and have never had an issue! This Grendal/ Arc BCG would chamber A round! After examination I found extractor would not pivot to allow bolt to fully go into battery , spring was way to stiff! Replaced extractor and spring with a modified set! Now work as it should!”
“BCG fit perfect, smooth operation, closed on the first try and passed the go no go test perfect, good price, great quality product! Definitely recommend this product.”
“Functions great!!! No ftf or fte. Machining is top notch and the price is where it should be. Thanks a lot for a quality product and package tracking!”
