Extended base pad promotes proper magazine orientation and seating Base pad is machined from aluminum Base pad fits factory RugerA(R) MKII(TM) and MKIII(TM) magazines Competition magazine comes with extended base pad preinstalled Magazine fits both MKII(TM) and MKIII(TM) pistols Magazine has a steel construction, blued finish and polymer follower Mfg: Majestic Arms Fits - RugerA(R) 22/45(TM) MKII(TM) and MKIII(TM). Base pad - aluminum construction. Magazine - matte blue, steel construction.