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Posted: 10/5/2006 8:22:19 PM EDT
Got a Romy G kit built by JNEWT a month or so ago. With my current work schedule I STILL  haven't gotten a chance to get down to the range with it. Just spending some time cycling it and dry firing. Problem is...it's locking open with or without a mag. The piston seems to shift upward when it is completely pulled back. So what's going on with it?? Any ideas???Templar???? Anyone??? HELP??? 
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With a new fire control group the bolt carrier/bolt will often lock back when cycling by hand. Need to actually fire the rifle to see if it will operate correctly. With the catching of the FCG while dry firing it should work itself out after a hundred rounds or so actually fired. Lubricate the rails and fire the rifle and any burrs there should smooth out. Some guys will put an abrasive paste on the rails and hand cycle but if the rifle is operational and will fire it will smooth out on its own. On my 7.62x39 rifle when the bolt carrier is all the way rearward the piston actually seems to move downward a bit. On one 5.45x39 rifle I observed that the piston appears to move upward. This shouldn't be an issue as the bolt carrier and piston narrow down as they exit the rear sight block opening which allows for the movement of the piston with the loose tolerances in that area. Take the receiver cover off and you can observe this while hand cycling the action. |
| Install a recoil buffer, that will prevent the bolt carrier from going all the way to the rear of the receiver and possibly coming off the track. I also polished the bottom of the bolt carrier and the hammer to reduce any friction as the bolt carrier retracts and pushed the hammer down. |
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