There would have to be a major fallout in Canada's relations with the US and Europe sometime in the 1990's for this to happen at all. I'm thinking this would involve an ASB type event, but I can't think of anything ATM, so this will be purely handwavium. Canada has a pretty significant defense industry so license production and industrial partnerships are a must, so assume most of this equipment is jointly developed or locally manufactured. This is a rough list so anything that you think should be here feel free to add.
Army:
Leopard C2's will be in service for a while and the glaring issues with the T-series will prevent the T-90 from entering service. A T-95 or T-99 type tank possibly jointly developed with Russia is the most likely option.
Again their existing inventory will suffice until the Russian BMP replacement comes around. Some BMP-3's may be bought in small numbers but since its replacement is around the corner and is likely a joint development, it won't become standard. The same goes for the LAV-III, being replaced by the next generation Russian wheeled IFV.
The Gaz Tigr will replace most of their light vehicles like the MILCOTS Silverado's and G-Wagen's. Kamaz trucks will become standard for most transport and module carrier roles.
Artillery will be comprised of the Tornado family of MLRS and the Iskander tactical ballistic missiles, 2S35 Koalitsya SP guns and modern towed 152mm and 130mm howitzers to replace Russia's and Canada's existing guns.
Air defense is made up of radar guided ZSU-23-2's to replace their Oerlikon guns, the Pantsir S1 to protect strategic long range SAM batteries, Tor M2 to protect armored columns from air attack, Buk M3 for defense of bases, industrial facilities and other areas of strategic importance, and the S-400 for national air defense.
Small arms will now be mostly Russian standard calibers but made in Canada, with possible development of an intermediate cartridge like the proposed 6.5x39mm. An AK variant like the AK-12 or AK-107 built by Diemaco for their standard assault rifle, PKP and the RPK-74M in the GPMG and SAW role, Kord HMG, AGS-30, PGW Timberwolf rifles in 7.62x54R and .338 Lapua with a 12.7x108mm variant as an anti-materiel rifle and 9mm pistol designed by a Canadian company like Para-Ordonnance. The PP-2000 is their standard SMG with the AN-94 and AS Val for use by special forces, GP-30 for use with assault rifles and the RG-6 to occupy the same role as the Milkor MGL.
AT weapons include the RPG-28 and RPG-32 to replace the AT4, AT-14 Kornet to replace the TOW and the 9M123 mounted on BMP-3 based tank destroyers.
Air Force:
The Su-35S is their standard air superiority fighter and is built in Canada by Bombardier Defense along with its associated weapons. They are jointly developing a version of the PAK-FA with Sukhoi for the RCAF which will be built in Canada and is expected to enter service around 2020.
The Su-34 is their tactical bomber and long range strike aircraft and is also built by Bombardier. A stealthy PAK-FA based strike aircraft is in development as an eventual replacement. A joint development between Bombardier and UAC was also created to make a CAS aircraft to replace the Su-25.
The Yak-130 is their standard jet trainer replacing the Hawk and Bombardier is developing a replacement for the PC-7.
Antonov and Bombardier have formed a partnership to build and supply the AN-32, AN-70 and AN-124 for the RCAF. They use Canadian engines, modern avionics and largely composite construction. This partnership has been extended to include the CSeries airliners as well which will be used as MPA, AWACS and tankers but while these are under development A310's will be used as tankers and AWACS and the Dash-8 MPA's will be used as interm aircraft.
The Mi-38 is their standard utility helicopter and is built by Bombardier Rotorcraft with Canadian engines and avionics, the Mi-28 is their attack helicopter with similar modifications and Mil and Bombardier are developing a heavy lift helicopter to replace the Mi-26 in Russia and the CH-47 in Canada. The Ansat is used for scout and recon roles.
Navy:
Canadian shipbuilding companies have been contracted to develop a new class of destroyer and frigate to replace their existing vessels. The destroyers are expected to be armed with a naval 2S35, S-400 and SS-N-27 Sizzler family of missiles, AK-630M-2 CIWS and Naval Tor-M2 point defense missiles. The frigates are expected to use a naval 130mm gun, Naval Buk-M3, Kashtan CIWS, SS-N-27 Sizzler family and Type 65 torpedoes.
Joint production of the Lada class SSK's has commenced to replace their Victoria's and joint development of a SSN based on the Borei class has started.