Brownells – CMMG AR-15/M16 Gas Piston Conversion Kit

Heckler and Cock? Really? It's pronounced like Coke.

What is the price of the piston conversion kit ???

This (a gas piston) would have saved countless American lives in Vietnam.

@Jmanwit Did you get this to work? I have the same issue

Do they have one for a 20inch barrel?

Piston is a better system if you are in full auto or goin through a Shtf situation. What ever you have, train with it

"if violence is not solving your problems, your not using enough". -me

Can the Bolt Carrier group be replaced with those of Fail Zero?

@ANIMExFAN2 does anyone here take this 15 year old kid seriously? its apparent hes never fired a gun before… any way we can ban this annoying idiot before he takes his dads gun to school?

@ANIMExFAN2 sorry, but i dont use my sisters account, im old enough to have my own

@ANIMExFAN2 does anyone else find this kids pink and purple profile with little cartoons all over it kind of discrediting when trying to debate guns? not even given the fact theyve proven they really know nothing about them? or the fact army special forces can carry pretty much whatever the individual chooses, and the majority of them choose the colt M4… but hey, if a piston manufacturer says delta force uses them, then by all means it must be true

@ANIMExFAN2 listen kid.. go back to your call of duty world where you think you know what youre talking about, but you dont, all those you mentioned that actually do use pistons, none are as accurate as an M16.. youd know that if you werent an idiot, and youd also know a G3 doesnt use a piston either if you werent an idiot

@MrRustytrombone these piston systems advertise the AR-15 as having a flaw so they can offer you a product that fixes that nonexistant problem, if youre smart you wont buy into the gimmick and stick with direct impingement.. and keep your accuracy, with a piston your accuracy will drop to 1/4 or less of what it is now

@ANIMExFAN2 listen… your brother isnt old enough to own an AR-15, or an M16, and he damn sure doesnt know a thing about the design or engineering of one… so its best you and him both shut the hell up

@ANIMExFAN2 hah, just looked at this kids profile, he/she is 15.. hil-ar-ious

@ANIMExFAN2 aah, another kiddie who buys into the marketing, and assumes DI is flawed because an advertisement says so, a DI M4 will go 5,000 rounds before needing a cleaning, thats plenty, and more isnt worth cutting your accuracy into about 1/4 for.. but i guess id expect an idiot from someone named "anime fan"

@jebustheone good luck finding replacement parts when something breaks.. the DI AR-15 uses a simple thin metal tube you could find at a hardware store

@Halo2100 yeah… they usually dont take people with mental illness

@Halo2100 pistons dont increase reliability, any fouling that occurs is still there, water can still get into the piston, but youre not even going to get water into a DI tube unless you soak it.. and it has very little effects on the action.. about the only thing a piston increases is your weight, and the difficulty of hitting targets further down range as it noticably decreases accuracy

@Halo2100 youre not military, never will be.. im sure gas piston manufacturers boast about special forces using them, but in reality they dont, special forces using the M4 still use the direct impingement system, i know quite a few guys who are former and current special forces… in fact thats where id be now if i wasnt medically disqualified.

direct impingement is the way to go… pistons are a marketing tool, by falsely accusing the direct impingement system, piston manufacturers can convince potential consumers that a problem exists… and to no suprise they offer a solution for the low low price of about $400…. is it really better? or is it just business?… just because a company says its something you need, doesnt mean its true

@megadeth22885 No one realizes that the DI system blows the BCG straight back thats why they think the convesion wonderfull. I have found that with M855 ball I can go through about 2000ish before needing to wipe off the bolt. I installed the failzero BCG and a heavier buffer and am right now at about 3800 rounds and have not taken down the BCG yet. Im going to wait for it to foul completely.

@hangemhigh2000 The cmmg .22 kit will work with the gas piston kit. There is a setting for the gas system. Turn off the gas system and the .22 conversion kit will function with the gas piston retrofit kit.

@C172Pilotdude truth about gas pistons.. a DI AR-15 will last 5k-10k rounds before a failure from fouling, is more accurate than a gas piston system, and lasts just as long in mud.. if mud gets into the receiver.. direct impingement, piston, it doesnt matter… and that piston slamming back and forth causes the barrel to whiplash around throwing off your accuracy.. $275 to neuter your AR-15.. have fun

@megadeth22885 I got mine for 275.00