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Posted: 4/30/2005 5:10:21 AM EDT
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I'm thinking of replacing my standard front sight with a YHM-9394. I'm just not sure how I feel about a front gas block held on with set screws.. Anyone have any thoughts? I would also like to know how to make sure it's not canted when you mount it. The only thing I could think of was 2 levels, one on the gas block, one on the a3 upper 
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| Haven't had any problems with mine. The two levels works well to get the sight straight. You can dimple the barrel for an even more durable install but be absolutely sure the sight is where you want it first. Confirm that it is with a range trip, then dimple the barrel. Better yet, get the new clamp style front flip up from YHM. |
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FWIW... lightfighter.net/eve/ubb.x/a/tpc/f/7206084761/m/7471025621 fstick XXXXX posted 21 April 2005 07:27 PM BM OEM picatinny front sight block, 11.5" Numerous problems with these uppers.... Posts: 456 | Location: here, there | Registered: 25 April 2003 KevinB XXXXX posted 21 April 2005 08:12 PM Ack. I've a few bro's that said same. Just curious where these pinned blocks or other attachment method? ______________________________ Your village called, they want their idiot back! I've noticed that the tinfoil hat quotiant is directed related to the size of ones waistline... Posts: 766 | Location: As a Matter of Fact the Sky is Blue in my world... | Registered: 08 October 2003 fstick XXXXX posted 23 April 2005 12:02 PM Three hex/allen bolts, on the bottom, secure it. Posts: 456 | Location: here, there | Registered: 25 April 2003 KevinB XXXXX posted 23 April 2005 01:09 PM Ah - I have never had good luck with non pinned gasblocks - even the PRI one, I had one on an upper that went down to the Benning Sniper comp - fine for a bit of precison work - but as soon as it got shot agressively - it started to cough and gag. I have sworn to using tapper pinned gasblocks for work stuff. ______________________________ Your village called, they want their idiot back! I've noticed that the tinfoil hat quotiant is directed related to the size of ones waistline... shoobe01 XXXXX posted 29 April 2005 02:36 PM quote: I have never had good luck with non pinned gasblocks - even the PRI one, I had one on an upper that went down to the Benning Sniper comp - fine for a bit of precison work - but as soon as it got shot agressively - it started to cough and gag. I have even heard of them (rarely) letting go. Seems like it might shift first as reliability seems to go south, then it goes chunk, moves forward under recoil, things fall off and you borrow another rifle. Luckily, only heard of recreation and classes, not anyone killed by it. Everyone take that lesson to heart, and pin your gas block on. ------------------------ "Me, I have a science fiction writer's conviction that the damn robot is supposed to speak human, not the other way around." Posts: 408 | Location: Mission, KS | Registered: 19 November 2004 |
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