[Tactical Shooting]Semi-Auto to selective fire

[Figleaf23]

Hello,

Tactical Shooting gives rules for converting semi-auto weapons to full-auto, in which case they get a new ROF with a !.

In the real world, is it possible through further gun-smithing to add selective-fire options to such a conversion? What would it cost, weigh, etc.?

Thanks for any/all replies.

[Fred Brackin]

Originally Posted by Figleaf23

Hello,

Tactical Shooting gives rules for converting semi-auto weapons to full-auto, in which case they get a new ROF with a !.

In the real world, is it possible through further gun-smithing to add selective-fire options to such a conversion? What would it cost, weigh, etc.?

Thanks for any/all replies.

The semi to full auto conversion generally involves replacing one internal component called the disconnector. This part prevents auto fire in normal operation for a semi.

Giving a weapon selective fire capability is a lot more complicated unless dealing with a civilianized version of a firearm that is selective fire in military use i.e. turning an AR-15 "back" into an M-16.

If there is no normal selective fire version you'll probably have to _design_ several internal componets and make room for them inside the gun. You'll also need to modify the two-position control of a semi-gun from "Safe-On" to a three postion "Safe-Semi-Full" configuration.

The one thing I can tell for sure is that this will add no significant weight. The parts involved are all very small. It's much more dificult than the simple ROF! conversion. There's a fairly difficult Engineering Skill roll instead of the simple Armory roll in the ROF! cioversion. Almost certainly a full workshop and weeks if not months of time instead of a single part and a simple disssaessembly.

It's going to cost you more than buying yourself a gun that came in a Selective Fire version from the manufacturer even at black market prices. Maybe a lot more. It's more like designing (or gadgeteering) as variant of an existing gun than a modification.

[Sam Cade]

The complexity and viability of such a conversion is going to vary widely depending on the weapon itself.

HK family weapons (MP5,G3 and such) can be converted to full auto with a "Sear pack" full auto trigger group.

AR type weapons can be converted by dropping in M16 parts and a DIAS (drop in auto sear). Making a DIAS would be easy for anyone with a lathe. Alternatively, many AR lowers are one tiny hole away from being able to accept select fire parts.
Semi Auto:
http://mcb-homis.com/blog/trigger-animation.gif
Select fire:
http://mcb-homis.com/blog/m16animation1ww1.gif

Converting a semi-auto AK clone will involve punching a hole for the 3rd axis pin (often the pin hole is even pre-located with an indentation) and dropping in the select fire parts. Trivial.

A select fire glock is a couple hours for a fair machinist.
http://www.gunlistings.org/nevada-gu...elect_fire_kit

Its not to terribly hard to convert most semi-auto rifle to full auto either since John Norrel (and others) did all of the design work decades ago.

The semi to full auto conversion generally involves replacing one internal component called the disconnector.

No.

[fredtheobviouspseudonym]

AR type weapons can be converted by dropping in M16 parts and a DIAS (drop in auto sear). Making a DIAS would be easy for anyone with a lathe. Alternatively, many AR lowers are one tiny hole away from being able to accept select fire parts.

IIRC this may have been true for the early (pre-1980, again IIRC) civilian AR-15s.

The later ones had their mechanisms specifically re-designed to make it difficult to convert to full-auto-only or selective fire.

[Sam Cade]

Originally Posted by fredtheobviouspseudonym

IIRC this may have been true for the early (pre-1980, again IIRC) civilian AR-15s.
The later ones had their mechanisms specifically re-designed to make it difficult to convert to full-auto-only or selective fire.

..full auto bolt carriers aren't a controlled part.

http://www.bravocompanyusa.com/BCM-B...0auto%20mp.htm

[Daeglan]

something to keep in mind. It is actually harder to make a semi auto than it is to make a full auto.