Glock locking clearance question & P80 drilling observation

[RecoilRob]

A while back I assembled an 80% G17 and while the finished product works fine I felt that I could do a better job drilling another frame...so I'm making another stab at it. The drilling went much better now that I changed my ways a bit: bushed the small holes with plastic tubing (from oil pressure gauge...fit just right) and pilot drilled with 1/16" bit then enlarged to final size.

The plastic drill guide fixture is too soft to prevent the bit from digging in a little on the side when drilling into the curved frame surface so I also knocked the side flutes off of the bits and they did drill nice straight holes this time.

Anyhow...to the question: I'm using Swenson slides and barrels from Midway and the first slide/barrel fit TIGHT....so tight that it almost took pressure to fit into lockup. This took a little break-in but now locks up well and the fitment is almost like a custom target type gun...very nice! But...the second slide has a wee bit-o-play with barrel in slide engaged in lockup. I have tried all three barrels on hand and all fit the same...so it's in the slide, but the wiggle is only about .002-.003" as near as I can measure it.

What I'm wondering is what does Glock use for their Go-NoGo specs regarding hood clearance in the slide? I don't think the small amount of clearance in the second slide is going to be an issue and might actually enhance the functionality should it get into dirt, just wondering how loose is too loose? Thanks guys.

 

[BBBBill]

I'm using Swenson slides and barrels

I don't like anything with the Swenson brand on it. The parts that I have handled were uniformly poor quality. Similar to stuff branded John Masen. I sincerely hope that what you have is better than what I've seen.

what does Glock use for their Go-NoGo specs regarding hood clearance in the slide?

Best hood to breech face fit is zero on any semi auto. Glock won't tell you their specs, but you could borrow a couple to measure. Or maybe someone here could measure theirs for you.

 

[RecoilRob]

Finally got the parts to complete the slide today.....and assembled the barrel locks up in battery with no play to be felt. I'm sure it will be fine.

The Swenson parts available at Midway are for sure much less expensive than other brands, but for the money the few examples I've got here seem to be a decent product for a very attractive price. The G17 5" threaded barrels were less than $70...which is really cheap. This was on sale and normally I think $120'ish which is still much less than most others available. The slide was on sale for $130...can't beat that and they seem to fit and work just fine. Time will tell how they hold up, but if someone is looking for inexpensive parts to complete a build...my samples here seem to be well made enough to work properly.