Here are my modifications on my Hammerli AR20FT:
a) Trigger TEC-HRO ( takes 10 second to change )
b) Butt-Hook MT Custom ( Bolds straight on )
c) Boomslang custom blue laminated hamster,grip and cheek piece. ( took about 2 weeks) check the nice pellet holder on the hamster.
My first thoughts on the Hammerli :
Best bang for your buck Period. Very Very accurate. Regulator works like a bomb about 5 ft/s spread average 40+ shots. Trigger as good as any Walther out there. Gun feels heavy. Cocking is stiff, buts get's easier the more you use the rifle. Rail similar to the Steyr, what a bonus.