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The Range
Rifle & Shotgun Discussion
Frankenstein AR-15 troubleshooting question
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<blockquote data-quote="dennishoddy" data-source="post: 3827314" data-attributes="member: 5412"><p>It sounds like you're under gassed. When I set up an adjustable gas block, (that you don't have) its adjusted down until the BCG won't lock open on the last round, then opened up 1/2 round. </p><p>It appears to me that your right at that breaking point where the gas is just enough to lock open when resting the rifle on the mag but not when firing offhand. There is a tiny bit of movement in that mag when firing that is the issue as when resting on that mag, it's pushing further up vs offhand when it's hanging.</p><p>My suggestion is to go to a variable gas block so you can tune it.</p></blockquote><p></p>
[QUOTE="dennishoddy, post: 3827314, member: 5412"] It sounds like you're under gassed. When I set up an adjustable gas block, (that you don't have) its adjusted down until the BCG won't lock open on the last round, then opened up 1/2 round. It appears to me that your right at that breaking point where the gas is just enough to lock open when resting the rifle on the mag but not when firing offhand. There is a tiny bit of movement in that mag when firing that is the issue as when resting on that mag, it's pushing further up vs offhand when it's hanging. My suggestion is to go to a variable gas block so you can tune it. [/QUOTE]
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Frankenstein AR-15 troubleshooting question
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