Best material to repair SL8 receiver?

[oneqball66]

What is the best liquid plastic, epoxy, etc to bond to and fill gaps with on a plastic Sl8 receiver?

I wanted to fill in the gap on the sl8...

What did Tbostic use on his Stock Conversion?

[robfurrow]

You’re better off using a scrap piece of similar plastic and shape it to fit (original SL8 handguard or stock) and use plastic epoxy to hold it in. I believe that Tbostic sells these plastic inserts to do private conversion work. Shoot him a pm and he will promptly respond.

[AviatorDave]

You can also solvent weld it pretty easily. Aqueous phenol with 10%-15% water works well. If you have gaps to fill, you can melt some chips of the same material in a little bit first until it turns in to a thick goo.

It works like model airplane cement - it melts the plastic a little, then hardens as the solvent evaporates.

Getting the texture right is the tricky part.

Send a PM to Chopstix Kid, he's been doing a lot of conversions, and you can't tell where the cut lines are. So many in fact that he's not accepting any more work until he clears his backlog.

[vkosty]

Whatever you do, do not use epoxy - it does not have flexibility to withstand twisting of the receiver (when fired), and you will have a crack develop after few rounds (happened to me twice with epoxy). Either solvent weld or Devcon II platic welder work the best. I have had good results with Devcon II. Heat welders work too, but require equipment and certain level of skill. To make the cover piece, I used the bottom plate of G36 magazine. Some people use SL8 magwells (since they are of good thickness and are made of Nylon 66 - same material as the receiver).

[nerd0606]

Devcon plastic weld