I wouldn't do it to a military model
IOW I would not do it if it would affect collector value. Otherwise I think it would be fun.
At a recent CSA I realized that a 16" AR is the modern equivalent of the M1 carbine in terms of size, fun, ease of shooting, etc. easy to put a red dot on one of those.
Complete thread:
- Red dot on M1 carbine? - 
stonewalrus, 
2012-09-02, 12:35 
- I wouldn't do it to a military model - 
Bj2, 
2012-09-02, 13:46
- It appears to be a parts gun. early sight and safety - 
stonewalrus, 
2012-09-02, 14:10
- My friend just did it to his IBM. - cas, 2012-09-02, 16:48
 - Early sight - JLF, 2012-09-02, 19:08
 - It appears to be a parts gun. early sight and safety - 
Catoosa, 
2012-09-02, 19:55
- this is a "permanent loan" gun, can't sell it - 
stonewalrus, 
2012-09-02, 20:52
- this is a "permanent loan" gun, can't sell it - Catoosa, 2012-09-02, 23:07
 
 
 - this is a "permanent loan" gun, can't sell it - 
stonewalrus, 
2012-09-02, 20:52
 
 
 - It appears to be a parts gun. early sight and safety - 
stonewalrus, 
2012-09-02, 14:10
 - I did...... - Byron, 2012-09-02, 20:53
 - I can fix you up with an Ultimak rail - 
Bob Hatfield, 
2012-09-03, 06:05
- Tom, I would by this Ultimak rail from Bob - Rob Leahy, 2012-09-03, 13:10
 
 
 - I wouldn't do it to a military model - 
Bj2, 
2012-09-02, 13:46