Hi all, just bought an M&P 15 Sport, and would like to swap out handguards for the A1 style triangular type. PK firearms makes a carbine length set, but states that round handguard cap must be replaced with triangle model (set comes with this piece.) I was wondering if anyone has done this before? I have never done any armorer work on an AR before. I want to know if I am going to be in over my head as a novice.
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A1 triangle handguards on M&P 15 Sport
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JaPes
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This is what you'll need to do:
Brownells - Changing A Gas Block - YouTube
Whether or not you should try to do this is dependent on your mechanical aptitude.
S&W uses tapered roll pins that drive out in the opposite direction from every other gas block on the face of the planet. I forget which side to drive out from. Take a look at the pin. Start driving out from the side which has the smaller diameter exposed pin head.
I advise soaking the pins in some penetrating oil. I had to pound the heck out of my roll pins to get them out.
Brownells - Changing A Gas Block - YouTube
Whether or not you should try to do this is dependent on your mechanical aptitude.
S&W uses tapered roll pins that drive out in the opposite direction from every other gas block on the face of the planet. I forget which side to drive out from. Take a look at the pin. Start driving out from the side which has the smaller diameter exposed pin head.
I advise soaking the pins in some penetrating oil. I had to pound the heck out of my roll pins to get them out.
MostlyHarmless
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Not difficult, but it take a bit of doing. The video pretty well says it all. You will probably want a few tools.
But if you're thinking of taking off the gas block/front sight post (and I would!), I would be tempted to make it into an A1 "dissipator".
Remove the front sight post gas block, and replace it with a low profile block that will fit under a set of handquards- you can find them for $30 or so. Then mount the front sight post with your triangle end cap at the front of the barrel, and put a full rifle length A1 handguard on it. To top it off, get a trident flash hider.
10x cooler than a carbine length handguard, for very little additional effort and expense. And the additional 6" of sight radius will make you more accurate with it.
But if you're thinking of taking off the gas block/front sight post (and I would!), I would be tempted to make it into an A1 "dissipator".
Remove the front sight post gas block, and replace it with a low profile block that will fit under a set of handquards- you can find them for $30 or so. Then mount the front sight post with your triangle end cap at the front of the barrel, and put a full rifle length A1 handguard on it. To top it off, get a trident flash hider.
10x cooler than a carbine length handguard, for very little additional effort and expense. And the additional 6" of sight radius will make you more accurate with it.
I appreciate all of the advice. Doesn't seem too far out of reach, with the right tools. The dissipator option is not one I even thought of, but quite a cool option. I am glad I now have the right tools to make my decision. Thanks again!
