So i got a FN SLP mk1 for my birthday. and am wanting to dress it up, but no tmany places/sites carry acessories for the SLP. what other models closely resssemble the SLP that i can use parts for? for example, i know the remington 870 is a pump action, but would i be able to use parts that were originally meant for the 870 on my SLP? such has telescoping stock etc. i want to get the benelli m4 skeletonized stock but thats going for well over $500+ on gunbroker and such.