I needed to set a lighter spring in my whole sized M16 A2 clone nevertheless it ran good. Tried using once again Using the eleven.five" Comando Colt higher. No dice. Ran 500 rounds of wolf by way of it currently. Didnt damage the spring whatsoever. - Features optimized geometric configuration https://edwindvlaq.wikiinside.com/2584716/helping_the_others_realize_the_advantages_of_rare_breed_frt_trigger