[bones0831]

I took My HK 93 out to clean the other day, did not fire. When reassembling, I had some trouble getting BCG back together, with the bolt head gapped, so the rollers were in. I did get it after several (well many) attempts, but when reassembled, I noticed there was little or no bolt gap, though I did not have feeler gauge, going by eye it looked like none. My question is, when do you check the bolt gap? After firing, or after reassembling after field stripping? Did my problem getting it back together(when I finally had the rollers in, I dropped the bolt vertically down into the receive, free fall) cause a one time problem, or is it going to stay like that with no gap, even after I fire it, and it cycles naturally? Thanks.

 

[HK556WI]

You need to fully assemble the rifle. Let the bolt slam home and drop the trigger. Then you can check the bolt gap. You will need a feeler gauge.

 

[jdonovan]

follow these directions to check gap

http://www.hkpro.com/forum/hk-reference-library/56875-bolt-assembly-bolt-gap-instructions.html

 

[JTinIN]

Got to the auto parts store or hardware for feeler gauges and spend the extra dollar to get the one with more blades in the range you wish to measure.

 

[Tiger 2 Tank]

You can't just "eye ball it". You'll need a set of feeler gauges for sure. Your gun is probably just fine.