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The Dark Kitten

17/32 Drill bit and general advice

Hi.
So when it comes down to brassing  a blaster (cough not that double down at B&M) what on earth do i need for it? I know the blaster and brass they are given but with no knowledge on the subject what do i need to take into account?
Especially if i want to keep the AR intact will drilling be a bit too aggressive and could possibly damage the AR construct?

Any advice would be very appreciated.

Kitten
UKNerfWar

When I used to make brass inserts for LS breeches, I used to cut the brass and file the ends, then place it in the freezer for an hour or so. Then it was a fairly easy fit into the breech.
OldNoob

You should not keep the AR intact, there's no reason to with a brass breech. The dart will also not always push back far enough to activate it. If you are using 17/32 OD brass for the bolt, then as noted shrinking it in cold works, as does round filing. Milling is better than drilling and most people will lack this capacity, or a drill press. IF you decide to drill CLAMP THE BOLT VERY SECURELY, DO NOT HOLD IT IN YOUR HAND UNDER ANY CURCUMSTANCES.
I would buy a reaming bit as opposed to a drill bit, as you are simply increasing the diameter if the existing hole not boring a new one if you intend to use a drill.
The Dark Kitten

Cheers this is all very handy. I've already got my brass so all i need to do now is cut it down.
If freezing is much lower maintenance i may as well give it a go!
Many thanks both of you again.

Kitten
OldNoob

For cutting the brass, if you haven't got a dremel for the shaped cuts, use a jewellers piercing saw and razor saw for square cuts.
K&S tube is EXTREMELY soft and easy to damage, so dropping it, any kind of pressing or ooor saw work or finishing will wreck your breech.

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