Mod's consist of...

1. James Perotti lightened hammer,
2. Big Ed hammer debounce device (HDD), power adjuster, and 2-stage adjustable sear,
3. replacement hammer spring,
4. spring guide robbed from a 392, and
5. $14 .177-.22 conversion consisting of replacement 2260 barrel and .22 bolt.

The valve has never been removed from the gun, and transfer port and seal are original.



Consistency needs work, but I'm pretty satisfied with the efficiency.

01 737
02 727
03 734
04 741
05 738
06 736
07 735
08 738
09 741
10 741
11 749
12 750
13 748
14 747
15 755
16 749
17 758
18 754
19 752
20 762
21 764
22 759
23 768
24 763
25 760
26 764
27 769
28 765
29 769
30 766
31 768
32 764
33 761
34 752
35 754
36 757
37 754
38 755
39 763
40 765
41 764
42 756
43 758
44 755
45 751
46 752
47 751
48 742
49 737
50 745
51 730
52 739
53 732
54 720
55 731
56 726
57 718
58 721
59 708
60 700

Steve

What do you think the single biggest improvement was that was done - in term of either adding the HDD or the lightened hammmer, etc? Just curious.

...per se, but to make it possible to moderate the power setting and still run with the full rated 2000psi fill pressure.

Steve

Yep, just wondering. I can get 40 very usable shots at 18 ft.lbs with just doing a spring mod, so I might be looking to get the Ed HDD. I've got a B50 .177 coming from Ed, so maybe after I get it, I'll get back to my Disco. Thanks Steve.

Hey steve, i just got my disco, and im only getting 20-25 shots between refills, what would you reccomend for my first mod? Im pretty decent with tools, but i don't have many special purpose airgun or firearms tools.

Thanks
-JR

That will trim a foot-pound or two off the maximum power, but more importantly, it should drop the sweetspot of the velocity curve to the approximate middle of the pressure range.

If you don't like it that way, replacement springs are only a buck or so from Crosman Customer Service.

Steve