![]() Independent inspection has revealed issues with tolerance, assembly procedures, materials, etc. PSA has returned bad components as "in-spec" to people. Or a combination of tolerance stacking (which, according to TDP, shouldn't be a thing) It could be the takedown pin bores cut too low, or crooked, or maybe the takedown pins are too thick, etc. From the info in the OP it's likely in the lower. For the takedown pins to be that tight there's a mismatch in the bore concentricity between the receivers. This issue in the OP is not the same thing. Mega/Zev and the brands they OEM for are one of the receiver companies known for this tight fit. I have receiver sets that are very tight fitting. It comes from controlling the dimensions on the two halves and ensuring the lugs on the upper are the correct width and height, along with the pockets on the lower. "Tight" fitting receivers that are done right have concentric takedown pin holes. Lots of people pay lots of money to get very tight fitting receiver sets. Posts: 1004 | Location: Orange Park, FL. | Registered: November 26, 2000 The guys at RB Precision are very helpful. You may have some difficulty separating the upper and lower, with barrel up and rifle unsupported (hanging in the air) grasp the rifle by handguard and give a "smack" to the top of the buttstock, you may need to do this repeatable, usually 5-10 times will do the trick. You may see some of the anodized removed from the rear lug at the corners, AGAIN, this is normal.Ĩ. This will seem scary to a beginner but it is natural for a tight fit.ħ. When they are seated (little to no gap between upper and lower) lightly tap the rear takedown pin into place. Open and close, repeat being careful to keep the halves aligned, do not slam them together but continue to use increasing force to fit together, when almost completely together use a nylon or soft rubber mallet to tap upper receiver into final position.Ħ. Slowly push the 1/2's together, they will stick (THIS IS NORMAL) it will most likely not close completely at first this is normal.ĥ. Ensure the rear takedown pin is completely out in the open position (detent is holding)Ĥ. Lubricate the rear lug completely with a light grease (best) or oil, lube the inside of the receiver also.ģ. Assemble the front pivot pin to the upper.Ģ. Works every time.Īll of the Rock River Arms lowers are an extremely tight fit, they need to be worked in the following way :įor the love of God make sure there is no rounds in rifle and it is on safe, the hammer will need to be back in the cocked position!!! Our lawyers make us tell you that death is possible if this is loaded when you perform this, we like our customers please do not shoot yourself!ġ. I use this method during assembly rather than removing metal from the lower receiver or the upper receiver lug. The following is from RB Precisions website. If your lower is in spec as stated, it should work on a PSA as well. I have zero movement between my upper and lower and the more I shot it, the easier the pins became to remove. It may seem scary at first but works just fine. I knew this going in as RRA builds their lowers to be fit with uppers to get a tighter fit. My Aero Precision upper would not fit my RRA SBR lower. I’ll give you some good advice rather than tell you how to spend your hard earned money. For it is against scoundrels that oppressive laws are first aimed, and oppression must be stopped at the beginning if it is to be stopped at all. ![]() The trouble with fighting for human freedom is that one spends most of one's time defending scoundrels. “It is just as difficult and dangerous to try to free a people that wants to remain servile as it is to try to enslave a people that wants to remain free." ![]() This is not a gun for hanging over the fireplace or sticking in the umbrella stand, it is a gun for going out and making people miserable with." -Douglas Adams If that means sticking all sort of spikes and prongs and blackened bits all over it then so be it. Make it totally clear to anyone standing at the wrong end that things are going badly for them. 'Make it totally clear that this gun has a right end and a wrong end. "The designer of the gun had clearly not been instructed to beat about the bush.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |